The Shotgun in Halo. - derived from "Waiting"(The Motha Fucking Shotty, run the streets like John Gotti), then changed to the Gotti, now it is called The Herb.
A herb is either a male or female who enjoys the smell of others. This may mean that they are subtle about it and just smile when a girl with long hair who uses nice shampoo passes by, or they can be hardcore about it and sniff another persons hair dramatically and judge and consider their friendshippossibilities by what their hair smells like. They themselves have impeccable sense of style and enjoy philosophical thinking in their own time.
person1: hey man; whats up with him??
Person2: I dont know mate hes a herb.
person1: hard core?? or subtle??
person2: hard core..i think he has a thing for blondes though..